Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e52a5fecd7a85d…

MALICIOUS

PDF

70.2 KB Created: 2021-02-24 22:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d595e00bc83179f22adef45826901ab9 SHA-1: 66ebac441fa643de1f6cb48fd1f5e643a529a188 SHA-256: 61e52a5fecd7a85d7248e7d9114cd46cf3c721f5c39d4ec86e1b6c1eb3f7f5b3
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/award?keyword=how+to+explain+personification+in+poetry In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5fcecc2c4482c.pdfIn PDF document text
    • https://tozabofosizo.weebly.com/uploads/1/3/5/3/135340530/6f0a52403cf313.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/35555402563.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/57a619c2.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/saheeh_international_quran_arabic_text_and_english_translation.pdfIn PDF document text
    • https://maraduwiz.weebly.com/uploads/1/3/4/3/134363873/ruzufomusowisekuxizi.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/data_structures_in_cpp_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474176/normal_601f530c1a327.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/japuwunepozejiw_kusefapum_zanikor_lirik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/lupafiparizukokumefoda.pdfIn PDF document text
    • http://tesaminovosino.epizy.com/tevevabapu.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/google_map_website_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/jupitu.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/pasigonowobadinuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/97478887508.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 5232 bytes
SHA-256: c0f86e814f9523123548d944211cdd7ddafadb0080ce522696a1c188761fe5fb
font_01_sfnt_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 10060 bytes
SHA-256: 9f72d2bd68f188b6bfb2992fc9a82b822ebf3104a2c0646c291ed0f451f8fb41

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